Curiosity

It's going to be a busy week, but I'm determined not to continue the recent diet of late night blips and I actually managed to get this before work this morning.

I've walked past this wall many, many times and never before noticed that it had a mobile phone cemented into it. I wonder why it's there... A prank? An art project? There's nothing to suggest either way, or how long it's been there.

Anyone out there in the know?